RL02-USB Controller Status/Problem
pete at dunnington.plus.com
Tue Apr 7 09:58:36 CDT 2015
On 07/04/2015 11:21, Johnny Billquist wrote:
> The STD144 reserves the last track of the device for pack information.
> In there you have the pack serial number, and also the manufacturer bad
> block list, and also the user bad block list.
While looking for something quite unrelated, I noticed that the RT-11
Device Handlers Manual says slightly differently. The user list is
stored, merged with the manufacturing list, in the home block (track 0
sector 1) of RL01/02 and RK06/07 volumes, beginning at offset 6
(HB.BAD). The actual replacement blocks are reserved space on the
second last track (or tracks 0,1 of the last cylinder on RK06/7).
The symbol names for the values in HB.BAD are defined in the .BBRDF
macro in the distributed file SYSTEM.MLB.
Offset Name Meaning
0 BBR.BD Bad block number.
2 BBR.GD Replacement block number.
BBR.SZ Entry size.
RSX-11 may not be the same?
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